Crankshaft balancing

[rulloyd]

Hi all.   Way back in the 80's I fitted a brand new crank into my GT6.  I was rebuilding the engine at the time and a local BL dealer was selling NOS cheap.

Now I'm rebuilding the engine again.  I'm wondering if I should have had the new crank balanced or is this completely unnecessary?  Incidentally, the engine was in quite a mess including wear on the crank when taken apart this last time.

Thanks for any advice.

Rich

 

 

[RogerH]

Hi Rich,

the TRiumph cranks were supplied in a balanced condition.

 

Roger

[Pete Lewis]

There are specialists who can balance to finer tolerances than orig production and will need flywheel clutch and front damper 

as an assembly  , they will spin the whole .

Not really neccessary ,  all down to preferences .it can make for smoother revs.

Pete

[rulloyd]

Thanks both.  I was wondering because I happened to watch the GT6 episode of Car SOS where the crank was balanced by Jigsaw

https://m.youtube.com/watch?v=M17XcEbhcOQ&feature=youtu.be

Mind at rest thanks👍

[JohnD]

No such thing as a crank "supplied already balanced".  It will be statically balanced, by adjusting the counter weights built in, but dynamic balance, when bolted up to the flywheel, clutch cover, front pulley, is a different story.    Ideally, this balance that can only be done on a special.rig, should be followed by equalizing the  conrod and piston weights, which can be done at home.

John

[Guppy916]

I had all mine done at   http://www.ocservice.co.uk/services/balancing

Crank shaft, flywheel, con rods & pistons , dont forget to take your new clutch cover as well